Firearm



E. G. REISING Aug. 9, 1966 FIREARM Filed Dec. 2, 1964 fad efgene 6'Reality M fh United States Patent flice Patented August 9, 19663,264,939 FIREARM Eugene G. Reising, Hartford, Conn. Harrington &Richardson Inc., Park Ave, Worcester, Mass.) Filed Dec. 2, 1964, Ser.No. 415,289 3 Claims. (Cl. 89-145) This invention relates to a new andimproved firing mechanism particularly adapted to semi-automaticfirearms. The principal object of the invention resides in the provisionof a pivoted trigger having mounted thereon a pivoted sear latchnormally engaging the sear to disengage it from the hammer upon pressingthe trigger, in combination with a pivotally mounted dis-connector forthe latch, the disconnector being under actuation by an action bar. Theaction bar retracts upon the firing of the weapon, depresses thedisconnector, and disengages the sear latch from the sear, so thatregardless of whether or not the operator keeps his finger on thetrigger or again presses the trigger, no further firing can be doneuntil the action bar is once more back in its forward position and thebolt closes the breech, so that the eifect is in general that thetrigger is completely disengaged from the sear and cannot actuate itunless the action bar is fully home and the breech closed.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which:

FIG. 1 is a view in side elevation of the firearm, parts being removed,and

FIG. 2 is a longitudinal section showing the firing mechanism on anenlarged scale.

The barrel of the firearm is shown at 10. This 'barrel is mounted on areceiver 12. The bolt is shown at 14 and as shown in FIG. 2 it is lockedin a notch 16 while in its forwardmost position as positioned by theaction bar 18. The action bar has an action bar spring 20 which causesit to move forwardly and it is interconnected with respect to the bolt14 as by the movable connection at 22 so as to move the 'bolt rearwardlyas shown in dotted lines in FIG. 2. The action 'bar spring then ofcourse moves the assembly forwardly and after the ejection of the spentcartridge on the retractive stroke, a new cartridge is received in thebreech under influence of the bolt as will be clear to those skilled inthe art.

There is a frame 24 mounted on the receiver and forming a guideway forthe action bar as well as mounting the firing mechanism and receiving amagazine not shown. There is a trigger guard 26 and a trigger 28. Thetrigger 28 is mounted on a pin at 30 and a trigger spring 32 normallymaintains the trigger in its forward position as shown in solid lines.Pivotally mounted as at 34 there is a sear latch 36 which has theinclined camsurface at 38 and an outstanding projection at 40. Also thissear latch is provided with a spring 42 to maintain it in its forwardsolid line position in FIG. 2.

There is a sear 44 which has a sear spring 46 normally urging it in acounterclockwise direction in FIG. 2 about its pivot pin 48. It has anose 50 for latching the trigger 52 which has a complementary nose 54.The hammer has a spring 56 pivotally mounted at 58, this spring normallymoving the hammer to the firing position to strike the firing pin 60 inthe bolt.

The action is that the hammer is engaged with the sear under action ofthe action bar, as in solid lines in FIG. 2, and when the trigger ispressed, the sear latch in turn depresses the sear so that the nose at50 moves off that at 54 and releases the hammer. The hammer and sear areprovided with complementary cam surfaces 62 and 64 for reengagementthereof as will be clear when the action bar moves to the rear anddepresses the hammer so that it can snap under the sear nose 50 to beheld thereby.

Referring now to FIG. 1 there is shown a disconnector 66 pivoted at 68to a part of the frame 24. This disconnector is located laterally of themechanism described and shown in FIG. 2 but it has a rear end portion inthe form of a cam nose at 70 which engages the outstanding projection40, and at its opposite end it has a nose at 72 in the path of theaction bar 18.

The action is that as long as the action bar is in engagement with thenose 72 depressing the disconnect-or, thus raising the cam surface 70the sear latch will be held out of range of the sear, see the dottedlines in FIG. 2, and therefore the trigger is completely disconnectedfrom the scar and the firearm cannot fire. When the action bar returnsto its forwardmost position as is indicated by the reference numeral 76,see FIG. 1, the bolt 14 is fully home and locked and a new cartridge isin position, and then the sear latch is released by the disconnector andresumes its ready position for firing.

Having thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claims, but what I claim is:

1. In a firearm, a trigger, means pivotally mounting the same, apivotally mounted sear, a pivotally mounted hammer, a hammer springtending to move the hammer in a direction to fire the fire-arm, saidsear and said hammer having interengaging means for holding the hammercocked in position, means connecting the trigger and the sear for movingthe sear to hammer-releasing position by means of the trigger, an actionbar and action bar spring, a disconnector actuated by the action bar,said disconnector acting to disengage said second-named means when theaction bar is moved to the rear under influence of the explosive forcesof the cartridge in the breech of the firearm upon being fired by thehammer, said action bar holding the disconnector in trigger-seardisconnected position until the action bar returns to its originalbreechclosed position, the means connecting the trigger and searincluding a pivoted member mounted on the trigger and having adisconnectable engagement with respect to the scar, and a spring formoving the pivoted member toward sear-engaging position against theaction of the disconnector.

2. In a firearm, a trigger, means pivotally mounting the trigger, asear, means pivotally mounting the sear, a hammer, means pivotallymounting the hammer, a hammer spring tending to move the hammer towardfiring position of the firearm, said scar and said hammer havinginterengaging means for temporarily holding the hammer in cockedposition,

and a sear latch, means pivotally mounting the sear latch on the triggerin offset relation with respect to the axis of the means pivotallymounting the trigger, interengaging means between the sear and the searlatch by which the sear latch moves the sear to hammer-releasingposition under influence of said trigger,

a disconnector, means movably mounting the disconnector, an action bar,the action bar being adapted to engage the disconnector and move thesame in a predetermined direction, and means on the disconnectorengaging the sear latch and moving the sear latch about its axis in adirection to disengage it from the sear when the disconnector is movedby the action bar on the retr-active motion thereof, said disconnectorengaging said sear latch to maintain the same disconnected with relationto said sear until such time as said action bar once more disengages thedisconnector, and a spring for said action bar moving the same forwardlyand from contact with the disconnector.

3. In a firearm as recited in claim 2, a pivot pin for the disconnectorand means on the disconnector in the path of the action bar, saidlast-named means being positioned to be engaged by the action bar tomove the disconnector about its axis to disengage the sear action of thesear immediately upon initiation of retractive motion on the part of theaction bar, said taction bar being in operative contact with respect tosaid disconnector until it disengages therefrom substantially inbreech-closed position of the firearm.

References Cited by the Examiner UNITED STATES PATENTS 1,511,509 10/1924Diehm 89145 5 2,422,854 6/1947 Reising 89145 FOREIGN PATENTS 582,9638/1933 Germany.

BENJAMIN A. BO'RCHELT, Primary Examiner. FRED c. MATTERN, JR., Examiner.

1. IN A FIREARM, A TRIGGER, MEANS PIVOTALLY MOUNTING THE SAME, APIVOTALLY MOUNTED SEAR, A PIVOTALLY MOUNTED HAMMER, A HAMMER SPRINGTENDING TO MOVE THE HAMMER IN A DIRECTION TO FIRE THE FIREARM, SAID SEARAND SAID HAMMER HAVING INTERENGAGING MEANS FOR HOLDING THE HAMMER COCKEDIN POSITION, MEANS CONNECTING THE TRIGGER AND THE SEAR FOR MOVING THESEAR TO HAMMER-RELEASING POSITION BY MEANS OF THE TRIGGER, AN ACTION BARAND ACTION BAR SPRING, A DISCONNECTOR ACTUATED BY THE ACTION BAR, SAIDDISCONNECTOR ACTING TO DISENGAGE SAID SECOND-NAMED MEANS WHEN THE ACTIONBAR IS MOVED TO THE REAR UNDER INFLUENCE OF THE EXPLOSIVE FORCES OF THECARTRIDGE IN THE BREECH OF THE FIREARM UPON BEING FIRED BY THE HAMMER,SAID ACTION BAR HOLDING THE DISCONNECTOR IN TRIGGER-SEAR DISCONNECTEDPOSITION UNTIL THE ACTION BAR RETURNS TO ITS ORIGINAL BREECHCLOSEDPOSITION, THE MEANS CONNECTING THE TRIGGER AND SEAR INCLUDING A PIVOTEDMEMBER MOUNTED ON THE TRIGGER AND HAVING A DISCONNECTABLE ENGAGEMENTWITH RESPECT TO THE SEAR, AND A SPRING FOR MOVING THE PIVOTED MEMBERTOWARD SEAR-ENGAGING POSITION AGAINST THE ACTION OF THE DISCONNECTOR.